Flux quantization in granular superconducting microcylinders above the superconducting transition point
V. A. KhlusPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kovÉ. N. BogachekPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kovI. O. KulikPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kov
ABI
Abstract
The fluctuation conductivity is calculated for a granular metal film deposited on a nonconducting cylinder. For appropriate values of the parameters of the model it is anisotropic, i.e., has different components along the cylinder axis (δ‖) and perpendicular to it (δ⊥). The longitudinal (ξ‖) and transverse (ξ⊥) coherence lengths differ accordingly. The longitudinal component of the conductivity oscillates as a function of the field, the amplitude of these oscillations being proportional to exp (− L/ξ⊥), where L is the perimeter of the cylinder cross section.
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